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Baker Hughes Co. is a holding company. The firm engages in the provision of oilfield products, services, and digital solutions. It operates through the following segments: Oilfield Services (OFS), Oilfield Equipment (OFE), Turbomachinery & Process Solutions (TPS) and Digital Solutions (DS). The OFS segment provides products and services for on and offshore operations across the lifecycle of a well, ranging from drilling, evaluation, completion, production, and intervention. The OFE segment provides a broad portfolio of products and services required to facilitate the safe and reliable flow of hydrocarbons from the subsea wellhead to the surface production facilities. The TPS segment provides equipment and related services for mechanical-drive, compression and power-generation applications. The DS segment provides operating technologies helping to improve the health, productivity, and safety of asset intensive industries and enable the Industrial Internet of Things. The company was founded in April, 1987 and is headquartered in Houston, TX.

Chevron Corporation, through its subsidiaries, engages in the integrated energy and chemicals operations in the United States and internationally. The company operates in two segments, Upstream and Downstream. The Upstream segment is involved in the exploration, development, production, and transportation of crude oil and natural gas; processing, liquefaction, transportation, and regasification of liquefied natural gas; transportation of crude oil through pipelines; transportation, storage, and marketing of natural gas; and carbon capture and storage, as well as a gas-to-liquids plant. The Downstream segment refines crude oil into petroleum products; markets crude oil, refined products, and lubricants; manufactures and markets renewable fuels, commodity petrochemicals, plastics for industrial uses, and fuel and lubricant additives; and transports crude oil and refined products by pipeline, marine vessel, motor equipment, and rail car. The company was formerly known as ChevronTexaco Corporation and changed its name to Chevron Corporation in 2005. Chevron Corporation was founded in 1879 and is headquartered in San Ramon, California.

Halliburton Company provides products and services to the energy industry worldwide. It operates through two segments, Completion and Production, and Drilling and Evaluation. The Completion and Production segment offers production enhancement services that include stimulation and sand control services; cementing services, such as well bonding and casing, and casing equipment; and completion tools that offer downhole solutions and services, including well completion products and services, intelligent well completions, and service tools, as well as liner hanger, sand control, and multilateral systems. This segment also provides electrical submersible pumps, as well as artificial lift services; production solutions comprising coiled tubing, hydraulic workover units, downhole tools, and pumping and nitrogen services; pipeline and process services, such as pre-commissioning, commissioning, maintenance, and decommissioning; and specialty chemicals and services. The Drilling and Evaluation segment offers drilling fluid systems, performance additives, completion fluids, solids control, specialized testing equipment, and waste management services; drilling systems and services; wireline and perforating services consists of open-hole logging, and cased-hole and slickline; and drill bits and services comprising roller cone rock bits, fixed cutter bits, hole enlargement, and related downhole tools and services, as well as coring equipment and services. This segment also provides cloud based digital services and artificial intelligence solutions on an open architecture for subsurface insights, integrated well construction, and reservoir and production management; testing and subsea services, such as acquisition and analysis of reservoir information and optimization solutions; and project management and integrated asset management services. Halliburton Company was founded in 1919 and is based in Houston, Texas.

As of September 1, 2023, NexTier Oilfield Solutions Inc. was acquired by Patterson-UTI Energy, Inc. NexTier Oilfield Solutions Inc., through its subsidiaries, provides well completion and production services in various active and demanding basins. The company operates in two segments, Completion Services, and Well Construction and Intervention Services. The Completion Services segment offers hydraulic fracturing services to enhance production of oil and natural gas from formations with low permeability and restricted flow of hydrocarbons; wireline services; and perforating, pumpdown, pipe recovery, pressure pumping, and wellsite make-up and pressure testing services. This segment is also involved in the sand hauling, wellsite storage, and last mile logistics activities. The Well Construction and Intervention Services segment provides cementing services that incorporate custom engineered mixing and blending equipment to ensure precision and accuracy in providing annulus isolation and hydraulic seal, while protecting fresh water zones from its customers' zone of interest; and engineering software and technical guidance for remedial cementing applications, and acidizing to optimize the performance of its customers' wells. It serves integrated and large independent oil and natural gas exploration and production companies in the United States and internationally. NexTier Oilfield Solutions Inc. was founded in 1973 and is headquartered in Houston, Texas.

NOV Inc. designs, constructs, manufactures, and sells systems, components, and products for oil and gas drilling and production, and industrial and renewable energy sectors in the United States and internationally. It operates through two segments, Energy Equipment, and Energy Products and Services. The company provides solids control and waste management equipment and services, managed pressure drilling, drilling fluids, premium drillpipe, wired pipe, drilling optimization services, tubular inspection and coating services, instrumentation, downhole tools, and drill bits. It also offers equipment and technologies for hydraulic fracture stimulation, including downhole multistage fracturing tools, pressure pumping trucks, blenders, sanders, hydration and injection units, flowline, and manifolds; coiled tubing units, and wireline units and tools; connections and liner hangers; onshore production consists of composite pipe, surface transfer and progressive cavity pumps, and artificial lift systems; and offshore production, such as floating production systems and subsea production technologies, as well as manufactures industrial pumps and mixers. In addition, the company provides substructures, derricks, and masts; cranes; jacking systems; pipe lifting, racking, rotating, and assembly systems; mud pumps; pressure control equipment; drives and generators; rig instrumentation and control systems; mooring, anchor, and deck handling machinery; equipment components for offshore wind construction vessels; and pipelay and construction systems. Further, the company offers spare parts, repair, and rentals as well as comprehensive remote equipment monitoring, technical support, field service, and customer training. The company was formerly known as National Oilwell Varco, Inc. and changed its name to NOV Inc. in January 2021. NOV Inc. was founded in 1862 and is based in Houston, Texas.

Patterson-UTI Energy, Inc., through its subsidiaries, engages in the provision of contract drilling services to oil and natural gas operators in the United States and internationally. It operates through three segments: Drilling Services, Completion Services, and Drilling Products. The Contract Drilling Services segment provides contract and directional drilling services in onshore oil and natural gas basins, as well as engages in the service and re-certification of equipment for drilling contractors, and provision of electrical controls and automation to the energy, marine and mining industries. The Completion Services segment offers services for hydraulic fracturing, wireline and pumping, completion support, and cementing; and involved in the power solutions natural gas fueling, and logistics and storage businesses. The Drilling Products segment manufactures and distributes drill bits for energy and mining markets. It also provides software and services, such as MWD Survey FDIR, a data analytics technology to analyze MWD survey data in real-time and identify the position of a well; HiFi Nav, which enhances FDIR by targeting improved vertical placement of the directional well within the reservoir; HiFi Guidance, utilizes trajectory optimization to determine optimal steering recommendations and placement within the reservoir; and rents oilfield tools. The company was founded in 1978 and is headquartered in Houston, Texas.

Schlumberger Limited engages in the provision of technology for the energy industry worldwide. The company operates through four divisions: Digital & Integration, Reservoir Performance, Well Construction, and Production Systems. The company provides field development and hydrocarbon production, carbon management, and integration of adjacent energy systems; reservoir interpretation and data processing services for exploration data; and well construction and production improvement services and products. It also offers subsurface geology and fluids evaluation information; open and cased hole services; exploration and production pressure, and flow-rate measurement services; and pressure pumping, well stimulation, and coiled tubing equipment solutions. In addition, the company offers mud logging, directional drilling, measurement-while-drilling, and logging-while-drilling services, as well as engineering support services; supplies drilling fluid systems; designs, manufactures, and markets roller cone and fixed cutter drill bits; bottom-hole-assembly and borehole enlargement technologies; well cementing products and services; well planning, well drilling, engineering, supervision, logistics, procurement, and contracting of third parties, as well as drilling rig management solutions; and drilling equipment and services, as well as land drilling rigs and related services. Further, it provides artificial lift production equipment and optimization services; supplies packers, safety valves, sand control technology, and various intelligent well completions technology and equipment; designs and manufactures valves, chokes, actuators, and surface trees; and OneSubsea, an integrated solutions, products, systems, and services, including wellheads, subsea trees, manifolds and flowline connectors, control systems, connectors, and services. The company was formerly known as Socie´te´ de Prospection E´lectrique. Schlumberger Limited was founded in 1926 and is based in Houston, Texas.

Weatherford International plc, an oilfield service company, provides equipment and services for the drilling, evaluation, completion, production, and intervention of oil and natural gas wells worldwide. The company operates in two segments, Western Hemisphere and Eastern Hemisphere. It offers artificial lift systems, including reciprocating rod, progressing cavity pumping, gas, hydraulic, plunger, and hybrid lift systems, as well as related automation and control systems; pressure pumping and reservoir stimulation services, such as acidizing, fracturing and fluid systems, cementing, and coiled-tubing intervention; and drill stem test tools, and surface well testing and multiphase flow measurement services. The company also provides safety, downhole reservoir monitoring, flow control, and multistage fracturing systems, as well as sand-control technologies, and production and isolation packers; liner hangers to suspend a casing string in high-temperature and high-pressure wells; cementing products, including plugs, float and stage equipment, and torque-and-drag reduction technology for zonal isolation; and pre-job planning and installation services. In addition, it offers directional drilling services, and logging and measurement services while drilling; services related to rotary-steerable systems, high-temperature and high-pressure sensors, drilling reamers, and circulation subs; managed pressure drilling, conventional mud-logging, drilling instrumentation, gas analysis, wellsite consultancy, and open hole and cased-hole logging services; reservoir solutions and software products; and intervention and remediation services. Further, the company provides equipment and drilling tools; tubular handling, management, and connection services; equipment rental services; and onshore contract drilling and related services through a fleet of land drilling and workover rigs. Weatherford International plc was incorporated in 1972 and is headquartered in Baar, Switzerland.